So, you have an 880 and the battery goes out. You naturally buy a knock-off at ammie, since the 'real' batteries are crap. After a couple of years, you get 'Charging Error 5' all the time. You can look on the web for hours and all you get is 'Don't use knock-offs.' blah, blah.
But it isn't that at all, it's the charger! It gets weaker and weaker, until it acts totally flaky, sometimes charging, and sometimes making the battery totally dead. Anyway, buy a new one, and it's all good. Yeah!